Síntesis quimioenzimática de ésteres metílicos de ácidos grasos a partir de aceite residual y cálculo de sus parámetros fisicoquímicos
Chemoenzymatic synthesis of fatty acid methyl esters from residual oil and its physicochemical parameters calculation
DOI:
https://doi.org/10.54167/tch.v15i1.755Keywords:
ester, fuel, oil, residual, biodiesel, biocatalyst, fatty acidAbstract
By the development of a 2k factorial design, the temperature and catalyst concentration were evaluated in the reaction for obtaining fatty acid methyl esters using residual oil as substrate, methanol as acyl acceptor, Candida antarctica Lipase B as catalyst and molecular sieves as drying agent. Experimental data was analyzed with an analysis of variance. Optimal catalyst-temperature ratios were determined at 13%-30°C, 14.5%-34°C, and 14%-35°C. No effect of molecular sieves was identified in the reaction yield. Contrary, was recorded for the acidity of product, which showed a significant decrease, from 0.79 to 0.40 mg KOH/g. Applying the mixing rules, the physicochemical properties of the fatty acids methyl esters (density, API gravity, kinematic viscosity, cloud point, vapor pressure, cetane number and heat capacity) were calculated. Results established that the biofuel is suitable for commercial use and meets the regulations for biofuels: ASTM D6751 and EN-14214. Tert-butanol was determined as the optimum solvent for the recovery and the reuse of the lipase.
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